Dressed to Kill is a 1980 American erotic psychological thriller film written and directed by Brian De Palma, and starring Michael Caine, Angie Dickinson and Nancy Allen. It depicts the events leading up to the brutal murder of a New York City housewife (Dickinson) before following a prostitute (Allen) who witnesses the crime, and her attempts to solve it with the help of the victim's son (Keith Gordon). It contains several direct references to Alfred Hitchcock's 1960 film Psycho.

Released in July 1980, Dressed to Kill was a box office success in the United States, grossing over $30 million. It received largely favorable reviews, and critic David Denby of New York magazine proclaimed it "the first great American movie of the '80s". Dickinson won the Saturn Award for Best Actress for her performance. Allen received both a Golden Globe Award nomination for New Star of the Year, as well as an inaugural first-year Golden Raspberry Award for Worst Actress.